@SYD and all: I can report that the EscapeSIM eSIM setup has worked perfectly thus far.
I purchased 3 eSIMs during an olympics sale and have now activated all three in Europe two months later. Mrs and Mstr Scarlett activated theirs during a transit at FCO and both picked up an Italian provider no problem. I activated mine during a transit in ATH and it picked up a Greek provider straight away.
We’re all now in Lisbon and again, no issues connecting to a Portuguese network.
For AUD8, 5GB data and a 30 day usage window across 30+ European countries, it was better than anything I could find on FlexiRoam or Airalo.